21221020011112 has 64 divisors (see below), whose sum is σ = 41237294400000. Its totient is φ = 10225769326080.

The previous prime is 21221020011091. The next prime is 21221020011137. The reversal of 21221020011112 is 21111002012212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385465764 + ... + 385520812.

It is an arithmetic number, because the mean of its divisors is an integer number (644332725000).

Almost surely, 2^{21221020011112} is an apocalyptic number.

It is an amenable number.

21221020011112 is a deficient number, since it is larger than the sum of its proper divisors (20016274388888).

21221020011112 is a wasteful number, since it uses less digits than its factorization.

21221020011112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58114 (or 58110 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21221020011112 its reverse (21111002012212), we get a palindrome (42332022023324).

The spelling of 21221020011112 in words is "twenty-one trillion, two hundred twenty-one billion, twenty million, eleven thousand, one hundred twelve".